Reality and voyeur pornography, animated videos, and legally prohibited acts also influence the classification of pornography. The name was coined from the title of the controversial book. Foot fetishism has been defined as a pronounced sexual interest in the feet or footwear. Preggo pornography features pregnant performers and may include erotic lactation as a fetish. There is, however, no third videos gays party camera work involved. Medical pornography involves sexualized medical, often fake, including gynecological pelvic examinations, rectal examinations, and pelvic or gynecological ultrasounds. The current public acceptance of celebrities with sex tapes is speculated by Joe Levy, executive editor of Rolling Stone, to be due to the easy availability of pornography, as well as couples more commonly making their own tapes due to the prevalence of video cameras. Those with diaper-related paraphilias differ widely hentai videos in their focus of attention. Sigmund Freud momsex considered foot binding as a form of fetishism. Bukkake is a sex act portrayed in pornographic films, in which several men ejaculate on a woman, or another man. The industry generally refers to such films as adult films, which is part of adult entertainment. Lolita pornography caters to ephebophiles. The term sadomasochism is derived from the words sadism and masochism . Snowballing or snowdropping is the human sexual practice in which one person takes someone else semen into his or her mouth and then passes it to the mouth of the other, usually through kissing. The naked appearance of actress Demi Moore in the advanced stage of pregnancy on the cover of Vanity Fair magazine in 1991 marked the beginning of a period which has since seen pregnancy presented by celebrities as a glamorous state of living, while also creating a market for photographers to produce images of pregnant mothers, and for fashion stylists to introduce pregnancy styling to their business. Rainbow party A rainbow party is an urban legend spread from the early 2000s.